430 PHOSPHURET OF NITROGEN. 



affected when heated in an atmosphere of chlorine or sulphur, 

 but is decomposed when heated in hydrogen, with the formation 

 of ammoniacal gas. The want of volatility and indifference to 

 most chemical reagents, which characterize this compound, are 

 properties that could not have been anticipated in a compound 

 of phosphorus and nitrogen. 



